ABB PP10 Manuale di istruzioni per l'uso - Pagina 4
Sfoglia online o scarica il pdf Manuale di istruzioni per l'uso per Controllore ABB PP10. ABB PP10 12. Field indicator and controllers, external relays: interposing/latching relay, k-tek level products
Stampa la pagina2.0 Mounting
The IR10 and PP10 units are generally mounted in an explosion proof enclosure using two 6-32 screws and
standoffs. The standoffs are required between the circuit board and enclosure. The units can be mounted in other
enclosures, if required.
The following procedure outlines the steps necessary to install the unit.
WARNING!
MAKE SURE CIRCUIT IS DEENERGIZED BEFORE INSTALLING THE UNIT!
1. Install conduit and field wiring per NEC requirements.
2. Use the unit schematic below to insure proper electrical connection. Be sure to note the appendix
regarding protection of the relay contacts. Relay contact damage will void the manufacturers war-
ranty. The external limit switches used to operate the unit are protected by an integral component on
the unit's circuit board.
3. Once satisfied that all connections are correct, cycle the upper and lower limit switches as in normal
operation. The relay should pull-in or drop-out as per the explanation of HLO and LLO above.
NOTE!
BE SURE TO CYCLE THE FLOAT FROM TOP TO BOTTOM AT LEAST ONE TIME. THIS
WILL INSURE THAT THE LATCHING REED SWITCHES ARE SET TO THE PROPER POSITION.
NOTES:
A. All field wiring connected to the controller must comply with applicable National Electric Code (NEC) guide-
lines.
B. Do not use the controller in ambient operating temperatures above 160°F.
C. Any conduit or fittings in close proximity to a magnetically activated switch should be aluminum or some other
non-magnetic material. This is necessary to avoid interference with the operation of any magnetically acti-
vated switches.
D. Conduit seal fittings (customer supplied) may be required at the enclosure conduit entrance in order to com-
ply with NEC guidelines. ABB recommends that seal fittings be installed at all conduit entrances to minimize
the risk of explosions as well as to seal the unit from water intrusion.
E. For units used in cold service (i.e. the temperature of the process liquid is cold enough to cause moisture ot
condense inside of the enclosure) the conduit entrances of the unit should be sealed with RTV Silicone or a
similar sealer. This will prevent the enclosure from filling with ice and/or water over a period of time.
F. When switching inductive loads, it is recommended that a metal oxide varistor (or similar suppression device)
be installed to protect the relay contacts (see appendix)
G. Unit is designed for installation in an Installation Category 11, Pollution Degree 2, as outlined by Section 6 of
the IEC 1010 standard.
H. The maximum altitude of operation is 6560 feet (2000 meters).
I. Protective grounding is provided for internally, located on the terminal strip, indicated by "GND."
4 IR10/PP10 Field Indicator and Controllers | Operating instruction manual